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fredmeister fredmeister is offline
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Join Date: Oct 2002
Location: Baltimore, MD, USA
Posts: 2,232
You can check cam timing by using the ignition timing light, no engine disassembly required!
Normally you hook up the strobe light to the number 1 cylinder to set ignition timing at idle. Mine for example set at 5 degrees BTDC......since I run a modified distributor in my 79 930 turbo.
Now hook the timing light to the number 4 cylinder wire and see where it is timed with regard to the Z1 mark on the crank pulley. It should not move much or at all ideally from where number 1 fires. This is due to the fact that the flat-6 firing order is 360 degrees crank rotation between number 1 and number 4 cylinder.
A little movement is to be expected because the cams are running on different sprockets but they should be damn close.
Just a tip that I discovered when diagnosing distributor/timing issues awhile back.
1979 930 Turbo....3.4L, 7.5to1 comp, SC cams, B&B intercooler, Snow Perf water/meth injection, Rarlyl8 headers, Garret GTX turbo, 36mm ported intakes, Innovate Auxbox/LM-1, custom Manually Adjustable wastegate housing (0.8-1.1bar),--running 0.7bar max
---"When you're racing it's life! Anything else either before or after, is just waiting"
Old 03-17-2008, 12:49 PM
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